ProcessMQTT

main-mqtt2.cpp

@@ -0,0 +1,163 @@
+#include <iostream>
+#include <string>
+#include <thread>
+#include <atomic>
+#include <queue>
+#include <mutex>
+#include <condition_variable>
+#include <csignal>
+#include <chrono>
+#include <cstring>
+#include "mqtt/async_client.h"
+
+using namespace std::chrono_literals;
+
+/* Configuration MQTT */
+const std::string ADDRESS = "tcp://rabbitmq:1883";
+const std::string CLIENTID = "CppClientTP";
+const std::string TOPIC = "geii/ordre/#";
+const int QOS = 1;
+const int CYCLE_MS = 100;
+
+/* Queue thread-safe */
+std::queue<std::string> orders_queue;
+std::mutex queue_mtx;
+
+std::string pop_all_and_get_last() {
+    std::lock_guard<std::mutex> lock(queue_mtx);
+    if (orders_queue.empty()) return "";
+    std::string last;
+    while (!orders_queue.empty()) {
+        last = orders_queue.front();
+        orders_queue.pop();
+    }
+    return last;
+}
+
+void push_order(const std::string &msg) {
+    std::lock_guard<std::mutex> lock(queue_mtx);
+    orders_queue.push(msg);
+}
+
+/* Etats machine */
+enum class MachineState { STOPPED, RUNNING, ESTOP };
+std::atomic<MachineState> machine_state(MachineState::STOPPED);
+std::atomic<bool> estop_flag(false);
+std::atomic<bool> running(true);
+
+/* Fonctions d'application */
+void apply_start() {
+    if(machine_state!=MachineState::RUNNING){
+        std::cout << "[MACHINE] -> START\n";
+        machine_state = MachineState::RUNNING;
+    }
+}
+
+void apply_stop() {
+    if(machine_state!=MachineState::STOPPED){
+        std::cout << "[MACHINE] -> STOP\n";
+        machine_state = MachineState::STOPPED;
+    }
+}
+
+void apply_estop() {
+    if(machine_state!=MachineState::ESTOP){
+        std::cout << "[MACHINE] -> E-STOP\n";
+        machine_state = MachineState::ESTOP;
+    }
+}
+
+/* Thread machine */
+void machine_thread_fn() {
+    while(running) {
+        if(estop_flag) {
+            apply_estop();
+            std::this_thread::sleep_for(std::chrono::milliseconds(CYCLE_MS));
+            continue;
+        }
+        std::string last = pop_all_and_get_last();
+        if(!last.empty()) {
+            if(last=="START") apply_start();
+            else if(last=="STOP") apply_stop();
+            else std::cout << "[MACHINE] Commande inconnue: '" << last << "'\n";
+        }
+        std::this_thread::sleep_for(std::chrono::milliseconds(CYCLE_MS));
+    }
+    apply_stop();
+}
+
+/* Callback MQTT */
+class callback : public virtual mqtt::callback {
+public:
+    void message_arrived(mqtt::const_message_ptr msg) override {
+        std::string payload = msg->to_string();
+        if(payload == "E_STOP") {
+            estop_flag = true;
+            std::cout << "[MQTT] E-STOP reçu\n";
+        } else {
+            push_order(payload);
+            std::cout << "[MQTT] Reçu: '" << payload << "'\n";
+        }
+    }
+};
+
+/* SIGINT handler */
+void sigint_handler(int) {
+    std::cout << "[MAIN] SIGINT reçu\n";
+    running = false;
+}
+
+int main() {
+    std::signal(SIGINT, sigint_handler);
+
+    /* MQTT async client */
+    mqtt::async_client client(ADDRESS, CLIENTID);
+    callback cb;
+    client.set_callback(cb);
+
+    mqtt::connect_options connOpts;
+    connOpts.set_clean_session(true);
+    connOpts.set_user_name("admin");
+    connOpts.set_password("ChangeMe");
+    try {
+        client.connect(connOpts)->wait();
+        client.start_consuming();
+        client.subscribe(TOPIC, QOS)->wait();
+    } catch (const mqtt::exception &exc) {
+        std::cerr << "Erreur MQTT: " << exc.what() << "\n";
+        return 1;
+    }
+
+    /* Threads */
+    std::thread th_machine(machine_thread_fn);
+
+    /* Boucle principale pour la réception */
+    while(running) {
+
+        std::string payload = R"({
+                "order": "STATUS",
+                "speed": 120,
+                "temperature": 36.1
+            })";
+
+        auto msg = mqtt::make_message("geii/telemetry", payload);
+        msg->set_qos(1);
+        client.publish(msg);
+
+        std::this_thread::sleep_for(100ms);
+    }
+
+    /* Arrêt */
+    try {
+        client.unsubscribe(TOPIC)->wait();
+        client.stop_consuming();
+        client.disconnect()->wait();
+    } catch(const mqtt::exception &exc){
+        std::cerr << "Erreur déconnexion MQTT: " << exc.what() << "\n";
+    }
+
+    th_machine.join();
+
+    std::cout << "[MAIN] Terminé\n";
+    return 0;
+}